Watertight watchcase



Feb. 4, 1936. E MQRF 2,Q29,784

' WATERTIGHT wATcHcAsE Filed` Aprii 2o', 1935 2 sheets-sheet 1 Patented Feb. 4, 1936 UNITED STATES PATENT OFFICEA Application April 20, 1935, Serial No. 17,503 In Switzerland April 26, 1934 2 Claims.

The present invention relates to a watertight watch case for fancy watches in which the hermetical ilt is obtained by an elastic packing inserted between the unbreakable glass and the case.

The case according to the present invention is rectangular and provided with a resilient bezel the rims of which have such a form that they can be applied by an elastic deformation to the circumference of the unbreakable glass so as to press this glass uniformly upon the packing.

Devices having the same object for watches having an ordinary form are already known. In these arrangements the glass is pressed upon the packing by means of a bezel screwed fast to the case band. But the great inconvenience of this arrangement is that no certainty can be obtained whether the joint between glass and packing is perfect after the bezel has been screwed fast. This deficiency is avoided by the arrangement according to the present invention where the packing is between caseband and glass by the possibility before putting the bezel into place to verify across the borders of the glass if there is everywhere good contact.

The annexed drawings represent as an example several working forms of the invention.

The Figures 1 to 6 relate to a first form of the case band where the Figure l is plan View,

'Ihe Figure 2 a cross section on line II-II in Fig. 1,

The Figure 3 is a view half side view, half longitudinal section,

The Figure 4 is a longitudinal section of the glass,

The Figure 5 a longitudinal section of the bezel and the Figure 6 a cross section of the bezel before put in place in the section according to line II-II in Fig. 1.

'I'he Figures 7 and 8 represent modications of a detail in section and 'I'he Figures 9 to 11 relate to a second form of the case band.

The Figure 9 is half elevation, half section,

The Figure 10 a longitudinal section of the glass and The Figure 11 a longitudinal section of th bezel.

The Figure 12 is a longitudinal section of another working form,

The Figure 13 a plan and The Figure 14 a side elevation.

In the working form of the Figures 1 to 6 a packing I of an elastic material is sunk in a groove 2 of the bulged case band 3. I'he glass 4 resting only on the packing is also bulged, but the bezel 5 which has to press the glass upon the packing is plane in the direction of the curvature of the case band and curved crossways (Fig. 6). Therefore by applying the bezel to the glass, it will be submitted to a deformation in both directions, longitudinal and crossways.

'I'he bezel is fastened according to the Figures 1 and 3 by means of screws 6 and lugs I applied to the four horns 8 of the case band 3. Screws 6 could also be placed in a bezel 5 according to the Fig. 7 on both end faces and engaging in lugs 1 and in horns 8 or they could be rep-laced by dowels 9 integral with a bezel 5" and held fast by pin III engaging in lugs 1 and in horns 8 asin Fig. 8.

If the case band 3 is plane, as shown in the Fig. 9, the glass I I has also a flat border (Fig. 10) but the bezel I 2 is bulged in both directions, longitudinal and transverse, as it is shown in the Figures 11 and 6, and must carry, when it is fixed by screws 6 engaging in lugs 1"' and in horns 8', a. deformation in the two directions indicated in the above.

In both cases, plane case band or bulged, the glass is provisionally put on and then it is possible to distinguish across the glass where the glass does not touch the packing.

Also in the example shown in the Figs. 12 to 14 the packing I is sunk into a groove 2 of the casing 3 and the unbreakable glass 4 applied to this packing is pressed on by a flexible bezel 5' pressed to the glass on two opposite sides by means of clasps I5. Each of these is provided with two horns I5 carrying the cross pins whereto the wrist band is attached. Two headed studs I6 are xed to each of the two narrow end faces of the casing and the clasps having slots I8 are slid over said studs and locked in this position by dowel pins l1 heid fast by a tight fit. 40

Instead of being connected to the case by means of studsl and lock pins as shown in the Figures 12 to 14 the clasps could be xed by means of screws,

In the Working example described here above the watch case and also the glass are bulged. It is evident that the same manner of fastening the bezel could also be provided for watches of a plane form.

What I claim is:

1. In a rectangular fancy watch the combination of a watch case having a faying surface provided with a groove, an elastic packing sunk into this groove, a'glass made of transparent, resilient material and provided with a border all round to fit the elastic packing, a bezel made of resilient material and fitting the border of said glass, the faying surfaces of case and bezel in one of the two directions of the rectangle being in each of two cooperating surfaces the one arcuate and the other plane and means being provided for bending the bezel to the glass to press the latter upon said packing.

2. In a rectangular fancy Watch the combination of a Watch case having a fayng surface provided With a. groove, an elastic packing sunk into this groove, a glass made of transparent, resilient material and provided with a border al1 round to t the elastic packing, a bezel made of resilient material and bent to t the borders of said glass, two headed studs xed to each small side of the case, two clasps carrying horns for attaching a Wrist band thereto and provided with slots to be slid over said headed studs, and locking pins stuck through the clasps into the end faces of the case and adapted to maintain the clasps fast to the case.

ERNEST MORF. 

